Presser-foot mechanism for shoe-sewing machines.



No. 688,l93. Patented Dec. 3, l90l.

E. NURMANCUT.

PBESSER FOOT MECHANISM FOR SHOE SEWING MACHINES.

(Application filed Oct. 28, 1901.) (No Model.) 2 Sheets-8hegt I.

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No. 688,!93. Patented Dec. 3, 190i. E. NORMANUUT.

PRESSER FOOT ECHANISM FOR SHOE SEWING MACHINES.

(Application filed Oct. 28, 1901.)

(No Mqdel.)

.2"sheats-sheet 2.

r'rnn STATES PATENT Orrrcn.

ENOCH NORMANOUT, OF MONTREAL, CANADA, ASSIGNOR TO THE COLUMBIA WIRESEWING LOOK STITCH MACHINE 00., LIMITED, A CORPORATION OF MAINE.

PRESSER-FOOT MECHANISM FOR SHOE-SEWING MACHINES.

SPECIFICATION forming part of Letters Patent N 0. 68 8,193, datedDecember 3, 1901.

Original application filed April 14, 1898, $eria1 No. 677,634. No.80,291.

To CLZZ whom it may concern:

Be it known that LENocH NORMANCUT, a subject of the King of GreatBritain, residing at Montreal, Province of Quebec, Dominion ofOanada,have invented certain new and useful Improvements in Shoe-SewingMachinery; and I do hereby declare that the following is a full, clear,and exact description of the invention, such as will enable othersskilled in to the art to which it appertains to make and use the same.

My invention relates to improvements in shoe-sole-sewing machines,andhas particular relation to mechanism for regulating and controlling thepressure of the pressure-bar on the shoe-sole during the sewingoperation, being a divisional application of that filed by me April 14,1898, Serial No. 677,634.

The object of the invention is to provide, primarily, a means forcontrolling the amount of pressure placed on the shoe-sole by thepressure-bar, said means preventing the application of excessivepressure. A further object is the provision of means for locking thepressure-bar in position after the amount of pressure has beenregulated. Other objects will be hereinafter made clear.

To these and other ends the invention c011- sists in the improvedconstruction and combination of parts hereinafter fully described,illustrated in the accompanying drawings, and particularly pointed outin the appended claims.

In the drawings,in which similar characters of reference indicatesimilar parts in all of the views, Figure 1 is a side elevation of aportion of a sewing-machine head, showing the rocking-lever, its cam,and other necessary operating parts. Fig. 2 is a central longitudinalsectionalview of the head. Fig. 3 is a horizontal sectional View takenon the line 3 3 of Fig. 2. Fig. 4 is a front elevation of the head withthe face-plate removed. Fig. 5 is a detail sectional view showing ameans for permitting the pressure of the rocking lever to be controlled.

In shoe-sewing machines of the type shown in said application above setforth, in which the needle operates from the shoe-horn, the

Divided and this application filed October 28, 1901. Serial (No model.)

stitching being on the inner portion of the sole, a pressure-bar must beprovided capable of withstanding the pressure of the needle while beinginserted, and as the shoe-horn is held against a vertical movement torelease this pressure when the work is to be fed the pressure-bar mustbe capable of a movement which will release the shoe from such pressureduring the feeding movement. Hence the provision of a reciprocatingpressure-bar. Owing to the fact that shoe-soles vary in thickness itwill be readily understood that a fixed movement of the pressure-bar(normally an essential feature) will be disadvantageous where thethickness of the sole is excessive and that provision must be made forrelieving the sole from the excessive pressure without changing thesolidity of the pressureresisting qualities of the pressure-bar when inposition to hold the shoe during the stitching operation. It is thepurpose of this invention to provide a structure of this character.

In the drawings, I designates the head of a shoe-sewing machine, havingat its front a guide 21 provided with a vertical slot i for thereception of the slidable pressure-foot 2' The guide 2' is provided witha transverse slot 2' which communicates with the vertical slot 2' andserves to allow of the passage of the pressure-bar lever (rocking lever)and the sliding wedge k which serves to coact with the rocking lever toform a support for the pressure foot 2' as well as to control the lengthof movement of the upright needle, the latter function not beingdescribed herein, as it forms no partof the present invention.

The pressure-foot 2'" consists of a slide-bar 2', adapted to slidewithin the vertical slot 2 and has its lower end provided with aren1ovable pressure-plate 2". The slide-bar 2" is also provided with avertical slot i within which is adapted to slide the adjustment-slide11", which is in turn provided with a vertical slot 21 whichcommunicates with the slot 2' in the guide 2?. The upper end of theadjust- 5 ment-slide 2' is provided with a slotted opening 2', havingits lower end enlarged for the reception of the head of the adjusting-screw g scares 1' which serves to raise and lower the adlated onits pivot j by means of the roller justment-slide t in the vertical slot1' The connection j riding up the inclined face of upper end of thesliding bar i is provided the groove in the cam 6 this movement of 70with a screw-threaded opening 1' within the rocking lever serving toforce the preswhich the pressure-releasing screw i is sure-bar downwardon the face of the sole adapted to have movement, said screw i which isto be sewed. As the thickness of being provided with a screw-threadcdopenthe sole is sometimes greater than the dising within which theadjusting-screwt' has tance between the upper face of the shoe- 75 itsmovement. Adjusting-nuts 11 are mounthorn and the lower face of thepressure-bar ed on the said adjusting-screw 73 one of when the latter isin its lowermost position, which is provided with an operating-handle tosome extent, and as the movement of the 2' A suitable lock-nut 2' isprovided to rerear end of the lever J is the same in all cases, tain theadjusting-screw i in position after where this is the case an excessivepressure 80 having been adjusted. would be applied on the face of thesole and 1' designates a removable face-plate prodestroy the evensurface by indenting. To vided with a vertical slot 1' havingcornprevent this, the hinged joint j is provided, munication with theslots t 71 as above described, this construction ena- B designates theoperating-shaft of the mabling the rear end of the rocking lever J to 85chine, extending vertically through the body move upward to its upperposition while the 20 and head thereof, and on which is mounted a lowerface of the pressure-bar rests on the side cam Z1 within which one endof a pivsole of the shoe without increasing the presotally-mountedrocking lever J is adapted to sure on the sole, the front end of thelever have operating connection by means of a suitremaining stationary,the blockj" being forced 9o able pin and roller-stud j, operating in theupward against the action of the spring as grooved face of the cam. Theopposite end the rollerj passes up the inclined face of the of the leverJ extends forwardly into and groove on the cam 6 and when the pressurethrough the slots '6 i and 2', the adjuston the sole exceeds theresistance of the block ment-slide 11 normally resting on the upper j,which resistance is regulated by the shape 95 face of the forward end ofsaid lever. Beof the opening. After the roller j has passed tween thepivotal pin j of the rocking lever up the inclined face of the cam 19and the and the front end thereof the lever is propressure of the leveris applied to the presvided with a hinged joint 7' the constructionsure-bar the wiper'cam b passes beyond conbeing such as to form anopening j having tact with the wiper 7c, and the spring it? forces IOOoppositely-inclined sides at the top of the lethe slide K rearward untilthe inclined face ver, this openingj being adapted to receive of thesliding wedge k binds against the lower a suitable friction-block j",normally held in face of the lever J and the lower face of the contactwith the inclined sides of the opening slot 71 forming a member betweenthe rockby means of a springj ing leverand the pressure-bar whichcontacts 105 To the top of the cam 19 is secured a suitwith both, andthereby providing practically 4o able wiper-cam b, which is adapted toride a solid portion against which the pressure of against the face of awiper is, formed on the the upright needle is exerted. There is thereendof a slide K, mounted to have longitudifore a locking of thepressure-bar in position, nal movement in the head I. Iivotally conandwhich remains unbroken until the wiper- 11o nected to the front end ofthe slide K is a cam again comes into contactwith the Wiper slidingwedge it the front end of which ex- 70 on its next revolution, it beingunderstood, tends through the slots of", 2' and 2' below of course, thatan upward movement of the the front end of the rocking lever J. Inorpressure-bar takes place when the rollerj d er that the slide K mayhave a quick action passes again to its low position on the cam 115 whenreleased from contact with the wiper- 19 this movement raising therocking lever,

earn 1) I provide an actuating-spring kflwhich wedge, and pressure-bar.

serves to force the slide K toward the shaft B. I do not limit myself tothe precise eon- As shown in the drawings, the front end of struction ofautomatic pressu re-regulating the lever J and the sliding wedge 7.3practidevice herein described, but claim the right no cally fill theslot 7 when the pressure-bar i to use any suitable mechanism for thatpuris in its upper position, which is when the pose.

side cam 19 begins its period of rest. This Having thus described myinvention, what serves to hold the pressure-bar i above the I claim asnew iswork to be done and allows of the insertion 1. A machine forsewing shoes comprising 125 Of the work on the shoe-horn or permits ofahead; a pressure-bar mounted to havea verthe feeding of the workbetween stitches. As tical movement therein; a rocking lever havthe camb carrying the wiper-cam b ,is roing a fixed movement on said head,adapted tated the wiper-cam b contacts with the to reciprocate saidpressure-bar; and a fricwiper k and causes the slide K and theslidtional pressure-regulating mechanism mount- I 3c in g wedge 10 to bemoved forward against the ed in said rocking lever,whereby the pressureaction of the spring thus releasing the adof said pressure-bar will beautomatically justing-slide i from its locked position. Afregulated. terthis is done the rocking lever J is oscil- 2. A machine for sewing shoescomprising a pressure-bar; a rocking lever for imparting movement tosaid pressure-bar; means for imparting movementto said lever; and meansfor automatically relieving the excess pressure placed on saidpressure-bar by said lever.

3. A machine for sewing shoes, comprising a head; a pressure-bar mountedto have a vertical movement therein; means for reciprocating saidpressure-bar vertically; and means for automatically relieving theexcess pressure caused by the thickness of the shoe sole.

4. A machine for sewing shoes, comprising a head; a pressure-bar mountedto have a vertical adjusted movement therein; means for adjusting theposition of said pressure-bar vertically in said head; means forimparting a vertical reciprocating movement to said pressure-bar; andmeans for automatically relieving the excess pressure caused by thethickness of the shoe-sole.

5. A machine for sewing shoes, comprising a head; a pressure-bar mountedto have a vertical movement therein; means for reciprocating saidpressure-bar vertically; means for automatically relieving the excesspressure of said pressure-bar caused by the thickness of the shoe-sole;and means for locking said pressurebar in posit-ion after beingreciprocated.

6. A machine for sewing, shoes, comprising in its construction a head; apressure-bar mounted to have a vertical movement therein; means forreciprocating said pressure-bar vertically within said head; means forautomaticall y relieving the excess pressure of said pressure-bar causedby the thickness of the shoe-sole; and means for automatically lookingsaid pressure bar in a fixed position after being reciprocated.

A 7. A machine for sewing shoes comprising a head; a pressure-barmounted to have a vertical movement therein; a rocking lever pivotallyconnected to said head and adapted to reciprocate said pressure-barvertically; means for automatically relieving the excess pressure ofsaid pressure-bar caused by the thickness of the shoe-sole; and meansfor automatically locking said pressure-bar in fixed position relativeto said rocking lever after having been reciprocated.

8. A machine for sewing shoes, comprising a head; a pressure-bar mountedto have a vertical movement therein; means for reciprocating saidpressure-bar; means for relieving the excess pressure of said pressurebar caused by the thickness of the shoe-sole; and means for locking saidpressure-bar in position after being reciprocated.

9. A machine for sewing shoes, comprising ahead; a pressurebar mountedto have a vertical movement therein; means for adjusting the'position ofsaid pressure-bar; means for reciprocating said pressure-bar; means forre lievin g the excess pressure from said pressure-bar caused by thethickness of the shoesole; and means for automatically locking saidpressure-bar in fixed position after the same has been reciprocated.

10. A machine for sewing shoes comprising a head; a pressure-bar mountedto have vertical movement therein; an adj ustment-slide adjustablymounted in said pressure-bar; means for reciprocating said pressure-barand said adjustment-slide; means for automatically relieving the excesspressure of said pressure-bar caused by the thickness of the shoe-sole;and means for locking said pressure-bar and said adjustment-slide infixed position after having been reciprocated.

11. A machine for sewing shoes comprising a head; a pressure-bar mountedto have a vertical movement therein; an adj ustmentslide adjustablymounted in said pressure-bar; a rocking lever pivotally connected tosaid head and adapted to reciprocate said adj ustment-slide and saidpressure-bar; means for automatically relieving the excess pressure ofsaid pressure-bar caused by the thickness of the shoe-sole; and meansfor locking said rocking lever in fixed position in saidadjustment-slide.

12. A machine for sewing shoes comprising a head a pressure-bar mountedto have a vertical movement therein; means for actuating saidpressure-bar; means for adjusting the position of said pressure-bar; andmeans for relieving the excess pressure placed on said pressure-bar.

13. A machine for sewing shoes comprising a head; a pressure-bar mountedto have a vertical movement therein; means for actuating saidpressure-bar; means for regulating the position of said pressure-bar;and means for automatically equalizing the pressure of saidpressure-bar, regardless of the thickness of the shoe-sole.

14. A machine for sewing shoes comprising a head; apressure-bar mountedto have vertical movement therein; a rocking lever-having a fixedmovement on said head and adapted to reciprocate said pressure-bar andmeans connected to said rocking lever for automatically equalizing thepressure applied to said pressure-bar by said rocking lever.

In witness whereof I have hereunto set my hand in the presence of twowitnesses.

ENOOH NORMANOUT.

\Vitnesses:

J. A. MARION, T. MYNARD.

